Tension device for cop-winders.



' H. SCHWEITER. -TENSON DEVICE FOR COP WINDERS.

APPLICATION FILED FEB. 21, 1914.

2 SHEETS-SHEET I.

(II/III Patented Apr. 11,1916. l

H. SCHWEITER.A

TENSION DEVICE FOR COP WINDERS.

APPLICATION FILED FEB. 21./1914.

Patented Apr. 11, 1916.

2 SHEETS-SHEET 2.

THE COLUMBIA PLANOURAPH 50.. WASHINGTON. D. C.

HANS SCHWEITER, or Horto'fnN, NEAR Zunorr, SWITZERLAND.

TENSION DEVICE FoNcOP-'WINDERs inventa.

Specication of Letters Patent. Patgigd A1313 1l, 191.6.

Application filed February 21, 1914. Serial No.. 820,240.

To all whom t may concer/rt.'

Be it known that I, I-IANs 'SCHWEITER, a

subject of the Swiss Confederation, residingV at No. 525 Lindenstrasse, Horgen, near Zurich, Switzerland, have invented certain new and useful Improvements in and Relating to Tension Devices for Cop-Winders, of which the following is a specification.

Cross cop winding frames are known in which the thread is subjected to greater tension, when winding the cop points, than when winding other parts of the cop. This results in the thread being'Y wound tightly on the tips of the cop, thereby vpreventingl the layers of thread from slipping o. The increased tension is produced, in the known frames, by the fact that the thread being wound on the cop point is drawn out by an auxiliary thread tensioner, so that the thread in forming the cop point has to travel an increased distance. This, however, has the result that the thread nearly always rubs against the auxiliary tensioner at the same place, and thus necessitates frequent renewal of this part. The thread also suffers by the repeated change of its course and' is very liable to break. These drawbacks are avoided in the present invention by the thread being braked with varying force before passing onto the cop.

One form of construction is shown in thev accompanying drawing, representing so much of Vthe apparatus as is necessaryfor understanding the invention.

Figure 1 is a side view of part of the machine. Fig. 2 a front view, and Fig. 3 a section on the line A-B of Fig. 1.

1A designates the spindle, which carries i the cop 2 and is rotated at high speed from the driving shaft 3 by toothed gears 4, 5. The shaft 3 drives byfmeans .ofv gears 6, 7 a shaft 8,r which carries a disk 9 provided with a cam groove in which engages a roller 10 carried by a sleeve 1l slidably-mounted inside the support 12. The sleeve 11 is loose on the spindle 1, and during rotation of the disk 9 it imparts a reciprocating movement to the spindle 1 by' known means. The spindle 1 and shafts 3 and 8 are mounted in the support 12, the latter being carried on a casing 27 fixed to the frame of the machine.

The thread 16 to be wound on the cop is wound from the source of supply, for eX- ample a reel, whence it passes over a guide wheel 14: carried by a lever 13 pivoted to thecasing 27, and thence between twobrake disks 15, :28 to the thread guide 17 `and'cop 2. .The two brakedisks 15 and 28 are looselyV mounted on a pin 19 carried by an arm 18,

which is lixed on a sleeve 21 bolted to the v Y casing 27. A rod 22, rotatable in the sleeve 21 carries at one end an arm forked at the top and engages with its other cranked end a cam 24 Xed ontheshaft 8 carrying the cam 9. Thus at every revolution of the shaft 8 the forked arm 23 is pressed once" against the brake disk 28, so 'that the thread 16 passingfbetween the latter and the disk 15 is periodically subjected to increased brake action. The brake disk. 1'5 abuts against a spring v25 on the pin 19, Vand the tension of the spring is adjustable bya nut 26 to enable the pressure on the .threadto' y be regulated as required.

As previously mentioned, the spindlel 1 and cop 2 are reciprocated by the cani disk 9, the thread is thus caused to'run on the point of the cop when the spindle isin its inner position. The position of the vcam 24EV with respect to the cam 9 is such that when the spindle is in Vits innerl position, so that,v the thread runs onto the point of the cop, the` cam 24: and arm 23 cause the brake disk 16 to ybe pressed against the tension disk 15 whereby 'the tension is increased. This lhas the effect' that the winding,` of the thread on the point ofthe cop is comparatively hard, thereby preventing the `last convolutions from dropping'off during the `wearoperating with said rst means to automati- 1 cally increase the tension on the thread said brake is prac# loo acting against the disks in oppositionl to Y said spring and. a cam engaging with thefree end of said lever `to oscillate it, thereby periodically compressing said spring. j

3. In a cop winding machine, a pair of when forming the point of the cop while the guide members for the thread, said members having a stationary aXis, manually adjustable means exerting aXial pressure on said members, and automatic means including a centrally fulcrumed lever, said automatic means coperating with said first means for periodically increasing the tension on the thread While practically retaining its path, a cam engaging one end of said lever While pressing its other end against one of said ifi guide members.

JThe foregoing speciiication signed at Zurich, Switzerland, this sixth day of February, 1914.

HANS SCHWETER. ln presence of HET. BAUMGARTNER, WV. THIRZEL.

Gopes of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

